p.mbeki

TL2 Moderator · Groningen

Contributes reviews on supplier material. Based in Groningen.

Joined 4 September 2025 · last posted 2d

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Coming back to: Delayed gastric emptying and oral medication absorption: which drugs… Replied, post #72 · Practice › Interactions · 26 Jul 2026 · 10 likes Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own…
Irish differences from the UK position — what changed since Replied, post #5 · Regional › UK & Ireland · 20 Jul 2026 · 0 likes Cross-border arrangements: some people source from other EU countries. Rules on import for personal use are changing post-Brexit. Current status requires checking with…
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile Replied, post #97 · Compounds › Semaglutide · 9 Jul 2026 · 33 likes The mass figure differs between sources because of how the different entities report it. The monoisotopic mass of the bare peptide is one number; the mass including the…
Purity assay versus content assay: two different numbers Replied, post #10 · Analytics › COA interpretation · 30 Jun 2026 · 1 like I read post #8 twice before replying, because I had assumed the opposite. Water content (residual moisture) matters: lyophilised peptide is not dry. A few percent water…
Why retatrutide discussion here is more cautious than elsewhere — one year on Replied, post #25 · Compounds › Retatrutide · 29 Jun 2026 · 18 likes Glucagon receptor agonism seems paradoxical in a weight-loss compound because glucagon raises blood glucose. The paradox resolves because glucagon agonism also…
Submitting a sample: the process end to end Replied, post #24 · Sourcing › Independent verification · 18 Jun 2026 · 4 likes Cost and turnaround: different services have different pricing and turnaround times. Janoshik's turnaround is weeks by mail; VendorInvestigate documentation review is…
Racemisation and why it is invisible to a mass measurement Replied, post #16 · Analytics › Impurities & related substances · 9 Jun 2026 · 14 likes Picking up post #13: that is the part I would want checked first. Related substances: compounds chemically related to the target peptide but not the target peptide…
Bioimpedance and hydration: why the number moves Replied, post #57 · Outcomes › Body composition · 8 Jun 2026 · 0 likes Changes during titration: measuring body composition during active titration is less useful than measuring after dose is stable. Titration causes fluid shifts that…
Revisiting: Primary endpoint hierarchies and why order matters Replied, post #20 · Evidence › Trials · 10 May 2026 · 0 likes Picking up post #17: that is the part I would want checked first. Intent-to-treat versus per-protocol: ITT includes everyone assigned regardless of whether they took…
Trust level 3 requirements: a clarification — does this still hold? Replied, post #43 · Meta › Announcements · 8 May 2026 · 1 like post #42 answers the question as asked. The question underneath it is different. Implementation timeline: announcements include when a change takes effect. Marking the…
How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ — does this still hold? Replied, post #6 · Sourcing › Independent verification · 23 Apr 2026 · 0 likes Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing. The correction was fair and I had…
Ultrasound and skinfolds: operator dependence in practice — what changed since Replied, post #35 · Outcomes › Body composition · 14 Apr 2026 · 11 likes Ultrasound: thickness of subcutaneous fat at specific sites. Less standardised than DXA and operator-dependent. Useful as a supplementary measure but not as a primary…